PayFence Visual Story
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APIs Create Value. Most Goes Uncaptured.
Millions of API calls from developers and AI agents. Without metering, that value disappears.
0+
API calls per day
$0
revenue captured
$0
monthly server cost
PayFence: API Monetization in Minutes
Three billing models — free, fixed, and metered. Node.js and Python SDKs. 3-line integration.
Before
- API is open — anyone calls for free
- No authentication, no metering
- Building billing takes 2-4 months
- Revenue: $0/month
After PayFence
- Three billing models: free, fixed, and metered
- 3-line SDK integration (Node.js and Python)
- Automatic quota tracking, metering, and webhook notifications
- Setup in under 5 minutes with plan templates
- Self-serve checkout via Stripe, free tier included
Two Integration Modes, One SDK
Proxy mode for zero-code setup. Middleware mode with 3-line SDK integration (Node.js or Python).
Proxy Mode
Zero code changes. Gateway handles everything.
Middleware Mode + SDK
3-line SDK integration. @payfence/middleware (Node.js) or payfence (Python). ~15-25ms per request.
Quota Runs Out. Revenue Begins.
402 Payment Required → Checkout → Payment → Quota Refills → Webhook Notification. All self-serve.
Quota Depleted
402 + Checkout URL
Stripe Payment
Quota Refilled
Webhook Notification
Turn API Costs Into Revenue
From $0/month to thousands in MRR. Free tier drives adoption. AI agents drive volume. 3 lines of code. Setup takes minutes, not months.
0 min
minutes to set up
0
lines of SDK code
0
billing models
$0/mo
net monthly revenue
Freemium Funnel Example
$0
500 Free users
$29
50 Pro users/mo
$99
10 Enterprise/mo
$2,440
Total MRR
$2,196
Net to provider/mo
Free Tier
Email signup, instant token
Node.js + Python SDKs
3-line integration
Webhook Events
5 event types, HMAC signed
Go-Live Checklist
Plan templates, guided onboarding
AI Agent Ready
Built for 1000x API volume